Ultrafine particle and production method thereof, production method of ultrafine particle bonded body, and fullerene and production method thereof
US6017630A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 21, 1997 |
| Grant date | Jan 25, 2000 |
| Priority date | — |
| Expiry date | May 21, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/30
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A target material having pores is disposed on a substrate. A high energy beam is irradiated to the inner walls of the pores of the target material in a slanting direction. Constituent atoms or molecules of the target material are detached from it to obtain a single or plurality of ultrafine particles separated as a unit substance. The superfine particles are formed at desired positions corresponding to the pores of the target material. Besides, by using an amorphous carbon substrate as the substrate, fullerenes such as an onion-like graphite are formed with the ultrafine particles as nucleation points. When the high energy beam is irradiated to at least two neighboring metal ultrafine particles, these metal ultrafine particles are bonded mutually. When the obtained metal ultrafine particle bonded body has a corresponding grain boundary, the high energy beam is further irradiated to lower value .SIGMA. of the corresponding grain boundary of the bonded interface. Besides, the metal ultrafine particle bonded body can also be made into a monocrystal grain or a polycrystal grain. Such a metal ultrafine particle bonded body is stable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.